Failed to update your /wp-config.php file automatically.

@son9ne Case-sensitivity of true does not matter–Comet Cache will detect and see it their either way. However, as @massimod said, you most likely have a permissions issue that is preventing Comet Cache from writing/reading your wp-config.php file.

@birdog123 That depends on your server environment and on how much you want to secure your site. 0644 should be enough to write to the file, assuming the web server is running under your user account (some servers are set up to have the web server running as a special www or apache user, in which case 0644 would not be enough).

For a description of what 0644 provides, see: http://permissions-calculator.org/decode/644/

See also: https://codex.wordpress.org/Changing_File_Permissions